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php - In mysql, is it more efficient to use int type as a primary key field than char type?

In mysql, is it more efficient to use int type as a primary key field than char type? Due to business requirements, it is necessary to use timestamp + 2 random numbers to form the ID. For example: 149561542040, a total of 12 digits. If the ID field uses integer bigint, will it be more efficient than...

黄舟 2017-05-25 15:08:20

java - PHP calls the map type of webservice, how to encapsulate it?

Now that the PHP side calls the Java side's webservice, the map type for Java will not be encapsulated. There are two known formats: For Java arrays, we use PHP arrays to correspond. For java objects, we use stdclass to correspond. So for the map type of Java, how to block it on the PHP side...

PHP中文网 2017-06-05 11:10:20

Set permalinks for custom post types in WordPress to root

I created a custom post type to organize a specific type of page, but since my WordPress permalinks are set to /blog/%postname%/, the permalink for this new custom post type is /blog/new- post-type. I don't want to remove /blog/ from the site's permalink settings because we use it in blog posts. How...

P粉267885948 2023-08-09 11:35:09

How to insert three ads in the list of video types on the video tutorial page

For example, how to insert three large picture advertisements in the list of video types on the video tutorial page of this website? Could it be that the number of pagination items of different types is controlled differently?

李绅 2019-12-10 20:50:53

Get the Props type from the component and omit the properties in it

I'm developing a TypeScript function for a React "higher-order component". Requires: A component, the ReactQuery useQuery type function returns the parameter array and is passed to the above useQuery type function optional resultKey, which determines whether the query results should be pro...

P粉704066087 2024-01-16 12:55:57

Type reference provision/injection functionality in VueJS

I'm trying to provide a typed ref from a parent component and inject it into the child component. I'm not sure if I understand the VueJS documentation, but this is what I came up with. importtype{Ref}from'vue'importtype{InjectionKey}from'vue'importtypeDocumentSetfrom'@/types/DocumentSet'constdocumen...

P粉441076405 2023-09-04 16:34:30

How to update JSON data type column in MySQL 5.7.10?

I recently started using MySQL5.7.10 and I really like the native JSON data type. But I have a problem while updating JSON type value. Question: Below is the table format, here I want to add 1 key to the t1 table in the data column. Now I have to get the value modify it and update the table. So an a...

P粉512363233 2023-10-16 19:03:34

Trying to access array offset of value of type bool in PHP 7.4

I just upgraded my server's PHP version to PHP7.4.1 and now I'm getting this error: NOTE: Trying to access array offset on value of type bool publicstaticfunctionread($id){$Row=MySQL::query("SELECT`Data` FROM`cb_sessions`WHERE`SessionID`='$id'",TRUE);#http://php.net/manua

P粉846294303 2023-08-24 09:06:21

"Please fill in this field" instead of custom error message | Symphony 5

Hi, I have a Symfony5 form with constraints on my fields, my constraints on the length work fine, but the NotBlank is incorrect. I have a "type" and "label" fields and I'm testing the form and the "type" constraints, if I validate the form with "type" empty it...

P粉877719694 2024-03-22 11:43:54

Xiaobai, please tell me where to modify the type and color of the red circle in the picture.

Hi, would you please tell me where to modify the type and color of the red circle in the picture? I can't find it anywhere. It's completely different from ASP.

捕快 2021-01-21 21:32:30

What does the symbol "ampersand (&)" in TypeScript type definitions mean?

In line 60359 of this type definition file, there is the following statement: typeActivatedEventHandler=(ev:Windows.ApplicationModel.Activation.IActivatedEventArgs&WinRTEvent<any>)=>void;In this context, what does the & symbol mean?

P粉668804228 2023-08-22 17:25:53

php - I have a question about type conversion. When converting float type to int, I thought there might be a problem, but the result was not?

For example, if I convert the float type 2.0000000000 into an int, the underlying storage should be 1.999999999999999. There is a precision limit, so when I convert this number to an int, I think it will become 1 (the decimal part is discarded), but I tested it. Several languages are still correct...

过去多啦不再A梦 2017-06-12 09:19:20

Add search bar to filter data within entity type fields in symfony6

I have a problem, I want to filter the output data in this entity type I found a solution but I should change the value of searchterm inside the script, $searchTerm='ri';$builder->add('userInput',EntityType ::class,['class'=>User::class,'query_builder'=>function(EntityRepository$er)use($se

P粉078945182 2024-04-03 21:32:53

javascript - How to convert string JSON data in the applet to Number type

{Code...} The above is my code. I want to realize that there are three questions on the page, each with four options with different scores. The results will pop up directly after the user selects them, but the JSON data that stores the options selected by the user is a string. How to convert to nume...

过去多啦不再A梦 2017-05-18 10:51:21

Unable to delete or update parent row

I'm a new user. I would like to ask about an error I encountered in my homework project. I create room_type_id which is the primary key in the room type table. The room_type_id is then included in the room table as a foreign key. The problem is if I enter one of the room type IDs as RI2 instead of R...

P粉696891871 2024-02-26 00:10:28

How to retrieve input tag corresponding to numeric input type from HTML form using PHP

I have a form that contains input boxes of type number, each of which has a corresponding label. I'd like to add a "review page" after submitting the form where you can see your answers to each input box (although you don't need to fill out all of them), just like you are sorting the tags....

P粉563446579 2023-09-14 16:49:06

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44

javascript - JS inheritance, how to avoid the situation where the object type attribute of the parent class prototype will be affected by the subclass;

Parent is the parent class, and child inherits parent. When the sex value of the child instance is modified, it will cause the sex of the parent and other subclass instances to change; whether this type of object type attributes can only be placed in the constructor, or whether it is agreed upon All...

过去多啦不再A梦 2017-06-30 09:59:00

Typescript code that does not take into account the possibility of array elements returning undefined

The following code passes in the Typescript type checker (v2.9.1) but throws a TypeError at runtime. interfaceItem{id:string}constlist:Item[]=[{id:'a'},{id:'b'}];constitem=list[3];//Type:ItemconstitemId=item.id;//Type :string takes into account that accessing an element in a typed array may always r...

P粉824889650 2023-08-24 12:15:44

How to manage inclusions, requirements, and usage in this project

In this PHP project without framework I have this folder structure: adapters, classes and models php file "index.php" is executed from the root directory and I have a problem with model and adapter classes index file <?phpinclude ('Class/Load.php');$connection=MysqlClass::getConnectionM...

P粉652495194 2024-02-25 18:11:04